نتایج جستجو برای: mâ3 agriculture return water and 4147 m

تعداد نتایج: 17000550  

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
محسن مهرآرا دانشیار دانشگاه تهران عبدالناصر همتی استادیار دانشگاه تهران علی سایه میری دانشجوی دکتری دانشگاه تهران و عضو هیات علمی دانشگاه ایلام

in recent years, the issue of global water scarcity has attracted increasing attention within academia, non-governmental organizations and as well as within the media. the aim of this paper is to ascertain whether there is a systematic relationship between agriculture water use and income, and particularly whether an inverted u-shaped relationship exists, as has been found for other resources a...

Journal: :مدیریت شهری 0
roohalah bayat elham sadeghian

on one hand, iran due to the low annual rainfall and lack of appropriate spatial and temporal distribution in precipitation is considered as an arid and semi-arid country experiencing stress and water scarcity; on the other hand, 90% of annual water consumption has been allocated to agriculture sector in iran and efficiency and productivity of water consumption do not enjoy favorable status in ...

Momeni, Hassan, Riahi, Vahid,

Introduction Water resources are maybe the most important and the most necessary available resource for human and agriculture section. Agriculture section with almost 11 percent of gross domestic production, 23 percent of employment, and more than 80 percent of feeding the people of the country has a vital role in Iran's economy. Water as the most important factor in agriculture section, has...

Salinity is one of the major challenges to increasing crop productivity. Besides these, in order to investigate of  proline and salicylic acid in the modulation of salt stress on soybean (Glycine max L.) , an experiment was conducted as split plot arrangement in a randomized completely design with four replication in 2016 in College of Agriculture, Shahrekord University. Main plot included thre...

جواد ترکمانی, , محمود صبوحی, ,

The endogenous selection and determination of return reference level is important in specifying risk efficient set. Thus, using multi-objective programming, Target–MOTAD in the framework of Mean-PAD and maximin parametric analysis models was established to obtained reference level of return endogenously. To determine non–inferior set for the farmers understudy, at first, the pay-off matrix was ...

Journal: :Agricultural Water Management 2022

The need for achieving efficient and sustainable use of water resources is pressing, however, this often requires better understanding the potential conservation, taking into account impact on return flows, costs in relation to sectoral benefits. Using modelling limited observational data we explore savings 24 combinations conservation measures Rufiji basin, Tanzania. We compare these with esti...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1388

abstract sensitive and precise voltammetric methods for the determination of trace amounts of furaldehydes, mainly as furfural (f) and 5-hydroxymethyl-2-furaldehyde (hmf), in waste waters and other matrices is described. determination of total furaldehyde at < ?g g-1 levels in alkaline buffered aqueous media was individually investigated. by the use of ordinary swv and adsorptive square wave ...

ژورنال: علوم آب و خاک 2007
جواد ترکمانی, , محمود صبوحی, ,

The endogenous selection and determination of return reference level is important in specifying risk efficient set. Thus, using multi-objective programming, Target–MOTAD in the framework of Mean-PAD and maximin parametric analysis models was established to obtained reference level of return endogenously. To determine non–inferior set for the farmers understudy, at first, the pay-off matrix was ...

In arid and semi-arid countries such as Iran, which are always faced water supply problems in various sectors due to climate stress, the importance of surface runoff management in watersheds is becoming increasingly apparent. One of the components of water resources management in each region is the initiatives of people living in and around watersheds based on their indigenous and empirical kno...

2007
Zhang Wen Guanhua Huang Hongbin Zhan

Zhang Wen , Guanhua Huang *, Hongbin Zhan c a Department of Irrigation and Drainage, College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing, 100083, PR China b Chinese–Israeli International Center for Research in Agriculture, China Agricultural University, Beijing, 100083, PR China c Department of Geology and Geophysics, Texas A&M University, College Station,...

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